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doris-doris-dispatch/client/nirvana_conhash.h

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2021-07-16 16:06:59 +08:00
#ifndef __NVN_CONSISTENT_HASH_H__
#define __NVN_CONSISTENT_HASH_H__
#include <stdint.h>
#ifndef CONHASH_MAX_POINTS_PER_BUCKET
#define CONHASH_MAX_POINTS_PER_BUCKET 128
#endif
#ifdef __cplusplus
extern "C"
{
#endif
enum CONHASH_ERRCODE
{
CONHASH_OK = 0,
CONHASH_ERR_INVALID_ARGS = -1,
CONHASH_BUCKET_NOT_FOUND = -2,
CONHASH_BUCKET_ALREADY_EXIST=-3,
CONHASH_NO_VALID_BUCKETS=-4,
};
struct conhash_bucket
{
uint32_t bucket_id;
uint32_t point_num; /*should be not more than CONHASH_MAX_POINTS_PER_BUCKET*/
void* tag;
};
struct consistent_hash;
/*API<50>̲߳<DFB3><CCB2><EFBFBD>ȫ*/
struct consistent_hash *conhash_instance_new(const struct conhash_bucket *buckets, uint32_t bucket_num);
void conhash_instance_free(struct consistent_hash *ch);
struct consistent_hash *conhash_instance_copy(struct consistent_hash *ch);
enum CONHASH_ERRCODE conhash_insert_bucket(struct consistent_hash *ch,const struct conhash_bucket* bucket);
enum CONHASH_ERRCODE conhash_remove_bucket(struct consistent_hash *ch, u_int32_t bucket_id, void (*free_cb)(void *tag, u_int32_t point_num));
enum CONHASH_ERRCODE conhash_renew_bucket(struct consistent_hash *ch, struct conhash_bucket* bucket); /*<2A><><EFBFBD><EFBFBD>point_num<75><6D>tag*/
enum CONHASH_ERRCODE conhash_lookup_bucket(struct consistent_hash *ch, const void* key, int len, struct conhash_bucket *result/*OUT*/);
enum CONHASH_ERRCODE conhash_lookup_bucket_int(struct consistent_hash *ch, u_int64_t randint, struct conhash_bucket* result);
double conhash_calulate_CVRSMD(struct consistent_hash *p);
u_int32_t conhash_get_bucket_num(struct consistent_hash *ch);
#ifdef __cplusplus
}
#endif
#endif